DUNGS MBC-65/120..., One-stage mode

[{"filename":"mbc-65-120_datasheet_en_239405.pdf","text":"GasMultiBloc®\n Control and safety\n combination\n One-stage mode\n\n MBC-65…\n MBC-120…\n\n 7.10\n\n\n\n\n • Compact design\n (105 mm long)\n\n • The following components can\n be integrated:\n\n - Microfilter\n\n - 2 x A valves\n\n - Servopressure regulator\n\n - Pressure switch\n\n • Max. operating pressure\n MBC-65:\t\tpmax. 200 mbar (20 kPa)\n MBC-65-N..:\t\t pmax. 65 mbar (6.5 kPa)\n MBC-120:\t\tpmax. 360 mbar (36 kPa)\n MBC-120-N..: pmax. 100 mbar (10 kPa)\n\n • Degree of protection: IP 54\n\n • Radio interference suppression; Technical description - Easy-to-mount, small dimensions, low\n Filter, valves, regulator and pressure switch weight\n interference level N\n are integrated in the DUNGS GasMultiBloc®\n to form a compact fitting. Application\n • Ambient temperature: The modular system provides individual so-\n -15 °C bis +60 °C - Dirt trap: Microfilter lutions in gas safety and control systems.\n - One regulator and two valves Suitable for gases of gas families 1, 2, 3\n • Other available servo pressure - Two valves (fast opening) and other neutral gaseous media.\n regulator models: - Regulator (fast opening) or regulator\n (slow opening) Approvals\n - Zero pressure - Solenoid valves as per DIN EN 161 EC type testing certificate as per:\n Class A Group 2 • EC-Gas Appliances Regulation\n MBC-65 to 200 mbar (20 kPa) • EC-Pressure Equipment Directive\n - Constant pressure regulator MBC-120 to 360 mbar (36 kPa) Approvals in other important gas consum-\n\n\n\n\n Printed in Germany • Edition 06.24 • Nr. 239 405\n \t\t - Sensitive setting of output pressure via ing countries.\n servopressure regulator as per DIN EN 88\n Class C Group 2\n - Opening delay by means of damped pres-\n sure rise\n - High flow values at low pressure differ-\n ence\n - DC voltage solenoid drive\n - Main valve restrictor downstream of\n regulator\n - Flange connections with tube threads as\n1…6 per ISO 7/1\n\fFunctional description\n Sectional view MBC-65-DLE-S20 1. Microfilter\nGas flow 2. Inlet P1\n1. Valves V1 and V2 are closed. Inlet 3. Housing\n pressure is applied to chamber A 17 4. Spring, gas pressure regulator\n until valve V1 is seated. 16\n 5. Diaphragms, gas pressure regu-\n2. The min. pressure switch is con- 15 lator\n nected to Chamber A by a bore- 6. Cover side\n 14\n hole. If the inlet pressure exceeds 13 7. Nozzle\n 12\n the reference value set on the \t\t 8. Outlet P3\n pressure switch, it switches to the 1 9. Main flow restrictor\n 11\n automatic gas burner control. 2\n A B\n C 10 10. Start gas restrictor\n 9\n3. After a release signal from the D 8 11. Damper\n automatic gas burner control, \t\t 7 12. Servopressure regulator\n valves V1 and V2 open. The gas 13. Adjustment screw - main flow\n flow through chambers A, B, C 3 4 5 6 14. Reference value adjustment\n and D of the GasMultiBloc is device - pressure regulator\n released. 15. Adjustment screw - start flow\n 16. Solenoid housing V1, V2\nDirt trap device 17. Electrical connection\nDirt trap device, fine-meshed filter (1) 18 Setting of opening time\nto protect the fitting. Pressure taps (only MBC-120)\n\nOperating mode of valve V1 and\nvalve V2 MBC-65 12\nThe plungers of valves V1 and V2 are\nconnected to the valve plate units. 9\nOn opening, the plungers pretension 1 V1 V2 P2 P3\nthe closing springs. The valves open\ncompletely without limitation. 10\n\n\n\nClosing function\nWhen the power supply of solenoid P1\n\ncoils of V1 and V2 is interrupted, the\nvalves are closed within < 1s by means MBC-120 18\n\nof pressure springs. 12\n\n\n 9\nOperating mode of servopressure\n 1 V1 V2 P3\nregulator\nThe servopressure regulator equalises 10\n\nthe pressure fluctuations in the power\nsupply. The output pressure is set at\n P1\nthe reference value adjustment device\n(14). The servopressure regulator\ncontrols the pressure regulator (5) via\nnozzle (7).\nThe “slow opening” function is enabled\nby a damped pressure increase. keeps the output pressure upstream of Gas pressure switch\nThe opening time of MBC-120 cannot the main flow restrictor constant. The The gas pressure switch monitors the\nbe set. burner pressure is determined when the gas pressure on the inlet side; the pres-\nWith MBC-120, the opening behaviour output pressure and the main flow restric- sure switch is preset.\ncan be adjusted at high operating pres- tor (9) are adjusted.\nsure values.\n Start-up response\nStart flow adjustment\nThe adjustment screw (15) for the start\nflow restrictor (10) is closed (factory\n Hauptgas-\nsetting). menge\nThe start flow can be set by opening\nthe restrictor up to approx. 80 % of the\nmain flow.\n Startgas-\n…